Procedure:Pressure cook 2 kilos of ube for 40 minutesWhile ube is softening, Mix 1/2 cup butter, 1 can of condensed milk, 1 can evaporated milk, 1/4 brown sugar. Heat in medium heat until simmer.Remove ube from pressure cooker then remove skin and mash the ube. Add it to the butter, milk and sugar mixture. Simmer in low-medium heat while stirring occasionally. Add water if the mixture becomes too dry. Once the ube is completely mixed and has good consistency. Take off heat and cool. Once cooled down pass through a sieve for finer texture. Keep in cool in fridge.